1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elena L [17]
3 years ago
11

PLEASE HELP! It’s urgent... and please show your work!!

Physics
1 answer:
bagirrra123 [75]3 years ago
4 0

Answer:

A) 3.8 x 10

Explanation:

You might be interested in
Find the height of the coconut from the ground at the moment the arrow hit it.
Wewaii [24]

Answer:

v = u + at \\ 0 = 45 \sin(20)  -  9.81 \times t  \\ t = 1.56s

7 0
2 years ago
Plate tectonics suggests that the__________floats and moves on the__________ .
Ann [662]
<span>Plate tectonics suggest that the lithosphere floats and moves on the asthenosphere.</span>
4 0
3 years ago
What is the meaning of the safety symbol shown below?
lora16 [44]

Answer:

D. Poison

Explanation:

8 0
2 years ago
Read 2 more answers
Suppose you exert 150 n on your refrigerator and push it across the kitchen floor at constant velocity. what friction force acts
Pachacha [2.7K]
Due that the velocity is constant that means that friction force is equal to the force exert by you, otherwise the refrigerator will accelerate or decelerate and in both cases velocity will not be constant.  
So then the friction force between refrigerator and floor is 150 Newtons.
8 0
3 years ago
Read 2 more answers
A 0.750 kg block is attached to a spring with spring constant 17.5 N/m. While the block is sitting at rest, a student hits it wi
Dmitriy789 [7]

Answer:

a

 A =  0.081 \  m

b

The value is  u =  0.2569 \  m/s

Explanation:

From the question we are told that

   The mass is  m  =  0.750 \ kg

   The spring constant is  k  =  17.5 \  N/m

    The instantaneous speed is  v  =  39.0 \  cm/s= 0.39 \  m/s

    The position consider is  x =  0.750A  meters from equilibrium point

   

Generally from the law of  energy conservation we have that

        The kinetic energy induced by the hammer  =  The energy stored in the spring

So

          \frac{1}{2} *  m * v^2  =  \frac{1}{2}  *  k  *  A^2

Here a is the amplitude of the subsequent oscillations

=>      A =  \sqrt{\frac{m *  v^ 2 }{ k} }

=>      A =  \sqrt{\frac{0.750 *  0.39 ^ 2 }{17.5} }

=>       A =  0.081 \  m

Generally from the law of  energy conservation we have that

The kinetic energy  by the hammer  =  The energy stored in the spring at the point considered   +   The kinetic energy at the considered point

             \frac{1}{2}  * m *  v^2 = \frac{1}{2}  * k x^2 + \frac{1}{2}  * m *  u^2

=>          \frac{1}{2}  * 0.750 *  0.39^2 = \frac{1}{2}  * 17.5* 0.750(0.081 )^2 + \frac{1}{2}  * 0.750 *  u^2

=>          u =  0.2569 \  m/s

3 0
2 years ago
Other questions:
  • What are some advantages of using the graphical method of vector resolution?
    12·1 answer
  • How could you separate a mixture of oil and water?
    15·1 answer
  • In an experiment, the explanation of the expected outcome, based on research, is the _______________.
    10·1 answer
  • A horse pulls a cart along a flat road. They start from rest and as time goes on their speed increases. Consider the following f
    15·1 answer
  • an ampere is the si unit of which of the following? electric power, electric current, resistance, electric potential difference
    9·1 answer
  • Suppose, the same angular momentum is transferred to two rotating bodies of different moment of inertia , how will you compare t
    14·1 answer
  • A bulb is rated as 25Watt -250 Volt. On connecting this bulb to a mains of 250 volts, what will be the value of current (I) flow
    5·1 answer
  • A high school physics teacher also happens to be the junior hockey team coach. During a break at practice, the coach asks two pl
    11·1 answer
  • What direction would the north pole of a bar magnet point if you were to hang the bar magnet from a thin string?.
    9·1 answer
  • Vhich type of reaction is modeled by this chemical equation?<br> PLi + CaCl2 - 2LICI + Ca
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!